Sierra Leone’s President Julius Maada Bio declared a state of emergency in the country on Friday over the rampant use of kush — known as the “zombie drug” — a psychoactive blend of highly addictive substances that has lately been mixed using ground up human bones. “We are making concerted efforts to combat this menace, but unfortunately we are experiencing a surge in kush consumption and escalated fatalities among its users,” President Bio said in a video message. “It is my solemn duty as your president, acting on the powers conferred on my by the constitution to declare a national emergency…